«We are also deeply concerned about what appears to be a culture of impunity and general lack of investigations into allegations of human rights violations in Papua,» they said in a statement.
Police in Papua sparked outrage this month after officers draped a snake around the neck of a suspect to persuade him to confess to petty theft.
A video circulated online showed a man being questioned about stolen mobile phones while seated with his hands tethered behind his back, yelling in distress as an officer pushed a snake towards his face.
Papuans had been treated in «cruel, inhuman and degrading» ways, added the experts, who include several special rapporteurs on indigenous and human rights.
A spokesman for the Indonesian Foreign Ministry was not immediately available for comment.
The national police have since apologised and pledged disciplinary action.
The case reflected «a widespread pattern of violence, alleged arbitrary arrests and detention, as well as methods amounting to torture used by the Indonesian police and military in Papua,» the experts added.
President Joko Widodo, who is up for re-election in April, has pledged to develop Papua, Indonesia’s poorest region, but faces criticism for not doing enough to investigate accusations of rights abuses by security forces there.